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Originally posted by ghw_nit at 2011-03-24 11:02:04:
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A(n+1)=2A(n)+2
A(n+1)+2=2(A(n)+2)
q=2
d1=a1+2=4
d(n)=A(n)+2=d1*q^(n-1)=4*2^(n-1)=2^(n+1)
A(n)=2^(n+1)-2
B(n)=(2^(n+1))/(2^(n+1)-1)=1+1/(2^(n+1)-1)
4Â¥2011-03-24 17:12:06
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